Space heater



Sept. 27, 1949. j R. E. CROZIER 2,482,746

' SPACE HEATER Filed Dec. 10, 1945 5 Sheets-Sheet l Inventor Robe/v f(raz/zr Sept. 27, 1949. I E, cRoz 2,482,746

SPACE HEATER Filed Dec. 10, 1945 3 Sheets-Sheet 3 2 I mmitor PatentedSept. 27, 1949 'UNITED STATES PATENT OFFICE SPACE HEATER Robert E.Crozier, Detroit, Mich. Application December 10, 1945, Serial No.634,041

1 2 Claims.

This invention relates to space heating and more particularly to a warmair heating system in which the air is circulated mechanicallythroughout the space to be heated.

The primary object of the invention is to improve the thermal efliciencyof such a heating system by utilizing the maximum amount of heatradiated by a heating unit.

Another object of the invention is to prevent overheating of the air andair ducts through which the Warm air is circulated so as to eliminatethe danger of fire occurring in a building as a result of overheating.

Another object is to prevent the release of noxious gases into the spacebeing heated and to clean and humidity the air before its release intothe air ducts.

The above and other objects may be attained by employing this invention,which embodies among its features a boiler having connected in. seriesthereto a pair of vertically spaced heat exchange units, an insulatedcasing enclosing least a portion of the boiler and the heat exchangeunits, means to create a draft of air through the casing and around theheat exchange unit and the boiler, means to regulate the firing of theboiler should the temperature of the heating fiuid flowing between theheat exchange units vary within definite limits, and means associatedwith the top of the boiler for interrupting the boiler firing should thetemperature oi. the water within the boiler exceed a predeterminedpoint.

In the drawings:

Figure l is a vertical sectional view through heating unit embodying thefeatures of this invention, portions thereof being broken away to moreclearly illustrate certain details of construc. tion,

Figure 2 is a sectional view taken substantially on the line 2 2 ofFigure l and looking in the direction of the arrows,

Figure 3 is a sectional view taken substantially on the line 3-3 ofFigure 1 and looking in the direction of the arrows,

Figure 4 is a sectional view taken substantially on the line ii ofFigure 1 and looking in the direction of the arrows,

Figure 5 is a fragmentary sectional view taken substantially on the line5-5 of Figure 1 and looking in the direction of the arrows,

Figure 6 is a perspective View of the apparatus in its entirety, and

Figure '7 is a fragmentary view of the apparatus showing a modified typeof boiler installed there- Referring to the drawings in. detail, aboiler i0 is provided with the usual firing opening which is closed by adoor it and an ash pit, access to which is had through a door-way whichis closed by a door l2. Leading from the upper end of the boiler is theusual flue-connecting pipe l3 which is adapted to be connected in thecustomary manner to a chimney or stack. The boiler It is provided withthe customary water jacket of conventional form, from the lower end ofwhich leads a pipe l5, and leading from its upper end is a pipe it.These pipes are connected, respectively, to heat exchange units l1 andis which, in turn, are connected in series through a suitable couplingi9. From the foregoing, it will be seen that the boiler and heatexchange unit combine to form a closed circuit through which waterheated from the boiler will circulate through the pipe l6 downwardlythrough the heat exchange unit 1%, coupling l9, heat exchange unit I!and back to the boiler through the pipe 55. Due to the arrangement ofthe parts, that is, the heat exchange units l1 and it being invertically spaced relation, it will be obvious that the heating unit iswill achieve and retain a higher temperature than can be maintained inthe unit IT.

The boiler is kept filled with water through the medium of a verticallyextending supply pipe 29, to the upper end of which is connected anexpansion 22 leads to discharge the water should it attain a heightabove a predetermined level within the tank 2|. Leading into the tank iiis a float valve 23 carrying a float 24 for an obvious purpose. Thefioat valve 23 is connected through a branch pipe 25 to a water supplypipe 25, one end of which is provided with an elbow 21 through which thehumidifier, to be more fully hereinafter described, is supplied withwater.

Enclosing the boiler l0 and the heat exchange units IT and I8 is acasing 28, the bottom of which is spaced upwardly from the bottom of theboiler so as to clear the ash pit door, and the front wall of the casingis formed with openings through which project the fiue connection l3 andthe frame surrounding the firing opening of the boiler. It will thus beseen that the interior of the casing 28 is isolated from any contactwith fiue gases, dust or dirt resulting from the firing of the boiler.

Extending horizontally from the back Wall of the casing 28 to a pointabout midway of the width of the boiler i0 is a baffle plate 29 and tank2| from which an overflow pipe extending vertically through the casingat a point about midwa of the length of the bafiie plate 29 arepartitions 39 formed with openings 3| for the accommodation of the heatexchange units H and M. It will thus be seen that the casing is dividedby the bafiie 29 and partition walls 30 into four chambers 32, 33, 34,and 35. An air intake duct 39 leads into the chamber 32 and outlet ducts39 lead from the chamber 35. These ducts may lead to any space that isto be heated so that warm air discharged through the ducts 38 will besupplied to the space and as the air cools it is withdrawn and returnedto the casing 28 through the duct 36.

In order to establish an air flow through the casing, I provide a blower39 which is connected through a funnel-shaped passage 40 to direct theblast created by the blower through the heat exchange unit I1. Theblower 39 is of conventional form and is adapted to be driven by anysuitable prime mover such as a motor 4|, and surrounding the blower andmotor is a housing 42 having openings 43 therein in which filters 44 aresituated so that air entering the chamber 32 cannot enter the casing 49without passing through the filters by which the air is cleansed of anydust or dirt that it may have gathered in the course or its circulationthrough the space. The prime mover 41 is adapted to be connected throughany suitable means to a thermostatic control device in the space to beheated so that when the temperature in such space falls below apredetermined point, the blower will be automatically started. It isunderstood, of course, that when the temperature in the space has beenbrought up to normal, the blower is automatically cut 011.

It is obvious that if so desired, suitable expansion couplings 49 may beemployed between the pipes l and I6 and their respective heat exchangeunits I1 and 18 so as to compensate for rapid fluctuation in temperatureand consequent expansion of the materials from which the parts are made.

Secured on a suitable bracket 5|] mounted on the boiler within thehousing 28 and preferably in the chamber 34 between the boiler and theheat exchange unit I 8 is a humidifier 5| which comprises a relativelyshallow tray or vessel 52 containing water 53. A float valve 54 issituated in the tray 52 and is connected through the medium of a pipe 55to the elbow 21 so that the water 53 in the humidifier may be maintainedat a constant level.

Should it be so desired, a modified type of boiler designated generally56 may be employed in which the outer surface of the boiler is providedwith heat radiating fins 51 to increase the heat radiating surface ofthe boiler.

While in the foregoing there has been shown and described the preferredembodiment of this invention, it is to be understood that minor changesin the details of construction and combination and arrangement of partsmay be resorted to without departing from the spirit and scope of thinvention as claimed.

What I claim is:

1. Space heating equipment which includes a casing, a boiler within saidcasing adjacent one end thereof, a baflle plate extending horizontallywithin said casing and partially around the boiler, a partition wallextending vertically through said casing to form in conjunction with thebafile plate an air inlet chamber and an air discharge chamber adjacentthe end of the casing remote from the boiler, the partition wall havingopenings therethrough above and below the baffle plate, a heat exchangeunit in each opening, said heat exchange units being connected in serieswith the boiler, and a blower within the air inlet chamber to direct ablast of air through the lowermost heat exchange unit toward the boileraround the end of the baflie plate adjacent the boiler and into the airdischarge chamber through the uppermost heat exchange unit.

2. Space heating equipment which includes a casing, a boiler within saidcasing adjacent one end thereof, a baiiie plate extending horizontallywithin said casing and partially around the boiler, a partition wallextending vertically through said casing to in conjunction with thebalile plate an air inlet chamber and an air discharge chamber adjacentthe end of the casing remote from the boiler, the partition wall havingopenings therethrough above and below the baflie plate, a heat exchangeunit in each opening, said heat ex change units being connected inseries with the boiler, and a blower within the air inlet chamber todirect a blast of air through the lowermost heat exchange unit towardthe boiler around the end of the baffle plate adjacent the boiler andinto the air discharge chamber through the uppermost heat exchange unit,a housing enclosing the air inlet of the blower, said housing having airinlet openings therein and air filters closing the openings in saidhousing.

ROBERT E. CROZIER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,664,317 Pabodie Mar. 27, 19281,778,146 Davis Oct. 14, 1930 2,104,212 Taylor Jan. 4, 1938 2,249,554Daly July 15, 1941 2,282,013 Wetzteon May 5, 1942 2,269,055 Gower Jan.6, 1942

